ImageView Event Handlers

Typedefs
using	pcl::ImageView::scroll_event_handler = void(Control::*)(ImageView &sender, int dx, int dy)

Functions
void	pcl::ImageView::OnScrollViewport (scroll_event_handler handler, Control &receiver)

Detailed Description

Typedef Documentation

scroll_event_handler

using pcl::ImageView::scroll_event_handler = void (Control::*)( ImageView& sender, int dx, int dy )

Defines the prototype of a scroll event handler.

A scroll event is generated when the viewport in this ImageView control has been moved with respect to the control's origin, e.g. when the values of one or both scroll bars have been changed. The event is generated just before updating the viewport, so this event handler can be implemented for optimization purposes.

Parameters

sender	The control that sends a scroll event.
dx	Horizontal scroll distance in viewport pixels. Positive values mean scrolling in the rightward direction.
dy	Vertical scroll distance in viewport pixels. Positive values mean scrolling in the downward direction.

Definition at line 1407 of file ImageView.h.

Function Documentation

OnScrollViewport()

void pcl::ImageView::OnScrollViewport	(	scroll_event_handler	handler,
		Control &	receiver
	)

Sets the scroll event handler for this ImageView control.

Parameters

handler	The scroll event handler. Must be a member function of the receiver object's class.
receiver	The control that will receive scroll events from this ImageView object.